CHIP MAGNETIC DRUM Russian patent published in 2020 - IPC E21B21/06 

FIELD: soil or rock drilling; mining.

SUBSTANCE: group of inventions relates to drilling operations and, in particular, to systems and methods for cleaning drilling fluid when it returns to surface from well shaft. Device comprises a magnetic housing having a longitudinal axis, wherein the magnetic housing comprises a pair of end discs, which are spaced along the longitudinal axis, and a magnetic unit located between a pair of end discs and configured to generate a magnetic field; and axis located along longitudinal axis of magnetic housing. Axis is configured to rotate magnetic housing about longitudinal axis. Each of pair of end disks contains the first set of holes and the second set of holes. First set of holes is located closer to longitudinal axis than second set of holes. Fixing elements pass through the first set of holes and the second set of holes to attach the magnetic unit to the end disks so that the magnetic unit could move in radial direction, having been fixed in longitudinal direction between the pair of end disks.

EFFECT: higher efficiency of drilling muds cleaning from metal inclusions.

16 cl, 8 dwg